Abstract: A system for the retraction and deployment of a panel is disclosed having a first planar surface beneath which is disposed a support structure; a panel; and an opening disposed in the first planar section which is configured to receive the panel into a closed position disposed in the opening and substantially co-planar with the first planar surface. Also provided is at least one slider assembly, comprising a stationary component and a sliding component, the stationary component coupled to the support structure and disposed at a sloping angle, the sliding component coupled to the panel at a hinge point such that the panel is rotable between a co-planar closed position angle and the sloping angle, and when the sliding component is fully extended is slidable on the slider assembly at the sloping angle to a stowed position.

Abstract: A desk or workstation for use with a keyboard or other manual data or control input device with a sliding portion of the top of the desk or workstation is disclosed. The sliding portion of the desktop retracts into the body of the desk at a downward angle to allow a user access to a lower level keyboard tray mounted beneath the sliding portion of the desktop. When the keyboard is not in use, the sliding portion can be deployed thereby protecting and concealing the keyboard or providing the user with a writing surface.

Abstract: A rodenticide bait block has a keyhole-shaped groove which can be formed by extrusion. A fastener, such as a nail, can be passed through the enlarged inner end of the groove and used to fasten the bait block to a surface. Various configurations are used for the external surface of the bait block to provide additional biting edges.